title: Selected wild strains of Agaricus bisporus produce high yields of mushrooms at 25°C.
abstract: BACKGROUND
  To cultivate the button mushroom Agaricus bisporus in warm countries or during summer in temperate countries, while saving energy, is a challenge that could be addressed by using the biological diversity of the species.
  
  
  OBJECTIVE
  The objective was to evaluate the yield potential of eight wild strains previously selected in small scale experiments for their ability to produce mature fruiting bodies at 25°C and above.
  
  
  METHODS
  Culture units of 8 kg of compost were used. The yield expressed as weight or number per surface unit and earliness of fruiting were recorded during cultivation in climatic rooms at 17, 25 or 30°C.
  
  
  RESULTS
  Only strains of A. bisporus var. burnettii were able to fruit at 30°C. At 25°C they produced the highest yields (27 kg m(-2)) and had best earliness. The yields at 25°C for the strains of A. bisporus var. bisporus ranged from 12 to 16 kg m(-2). The yield ratios 25°C/17°C ranged from 0.8 to 1.2.
  
  
  CONCLUSIONS
  The variety burnettii originated in the Sonoran Desert in California showed adaptation for quickly producing fruiting bodies at high temperature when humidity conditions were favorable. Strains of the variety bisporus showed interesting potentials for their ability to produce mature fruiting bodies at higher temperature than present cultivars and might be used in breeding programs.
authors.affiliation: Universidad Veracruzana, Facultad de Ciencias Biológicas y Agropecuarias, Córdoba, Veracruz, Mexico; INRA, UR1264 MycSA, Mycologie et Sécurité des Aliments, CS20032, F-33882 Villenave d'Ornon Cedex, France.
authors.forename: Pilar
authors.initials: P
authors.lastname: Navarro
authors.affiliation: INRA, UR1264 MycSA, Mycologie et Sécurité des Aliments, CS20032, F-33882 Villenave d'Ornon Cedex, France. Electronic address: savoie@bordeaux.inra.fr.
authors.forename: Jean-Michel
authors.initials: JM
authors.lastname: Savoie
mesh_terms: D000222:Adaptation, Physiological; D000364:Agaricus / Q000235:genetics / Q000254:growth & development*; D000383:Agriculture / Q000379:methods*; D044822:Biodiversity; D006358:Hot Temperature; D008800:Mexico; D009172:Mycology / Q000379:methods*; D012987:Soil
chemical_list: D012987:Soil
keywords: Adaptación a la temperatura; Diversidad; Diversity; Edible mushroom; Hongos comestibles; Temperature adaptation